8378894979 has 24 divisors (see below), whose sum is σ = 14895814752. Its totient is φ = 4419636480.

The previous prime is 8378894947. The next prime is 8378894981. The reversal of 8378894979 is 9794988738.

It is not a de Polignac number, because 8378894979 - 2⁵ = 8378894947 is a prime.

It is a super-2 number, since 2×8378894979² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8378894879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5114502 + ... + 5116139.

It is an arithmetic number, because the mean of its divisors is an integer number (620658948).

Almost surely, 2^8378894979 is an apocalyptic number.

8378894979 is a deficient number, since it is larger than the sum of its proper divisors (6516919773).

8378894979 is a wasteful number, since it uses less digits than its factorization.

8378894979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10230667 (or 10230664 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 72.

The square root of 8378894979 is about 91536.3041585141. The cubic root of 8378894979 is about 2031.0888202282.

The spelling of 8378894979 in words is "eight billion, three hundred seventy-eight million, eight hundred ninety-four thousand, nine hundred seventy-nine".